2015/10/02 by A. Fürrer, Albert Furrer
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemical physics #Chemistry #Condensed matter physics #Curse of dimensionality #Dimer #Doping #Inorganic Fluorides and Related Compounds #Local structure #Manganese #Materials science #Molecular physics #Multiferroics and related materials #Nuclear magnetic resonance #Physics #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/1742-6596/746/1/012058
published as J. Phys.: Conf. Series 746, 012058 (2016) · 6 pages, 3 figures, 1 table. arXiv admin note: text overlap with arXiv:1406.0602
arxiv created 2015/10/02 · openalex publication_date 2016/09/01 · arxiv updated 2017/02/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Defects intentionally introduced into magnetic materials often have a profound effect on the physical properties. Specifically tailored neutron spectroscopic experiments can provide detailed information on both the local exchange interactions and the local distances between the magnetic atoms around the defects. This is demonstrated for manganese dimer excitations observed for the magnetically diluted three-, two- and one-dimensional compounds KMnxZn1-xF3, K2MnxZn1-xF4 and CsMnxMg1-xBr3, respectively, with x=0.10. The resulting local exchange interactions deviate up to 10% from the average, and the local Mn-Mn distances are found to vary stepwise with increasing internal chemical pressure due to the Mn/Zn or Mn/Mg substitution. Our analysis qualitatively supports the theoretically predicted decay of atomic displacements according to 1/r**2, 1/r and constant (for three-, two- and one-dimensional compounds, respectively) where r denotes the distance of the displaced atoms from the defect.